Roman Numeral TDD Kata on the SSaurel's Channel

RomanNumeral.java

public static final int[] ARABIC_DIGITS = {10, 1};
public static final String[] ROMAN_DIGITS = {"X", "I"};

public String intToRoman(int arabic) {
   StringBuilder roman = new StringBuilder();

   for (int i = 0; i < ARABIC_DIGITS.length; i++) {
      while (arabic >= ARABIC_DIGITS[i]) {
         roman.append(ROMAN_DIGITS[i]);
         arabic -= ARABIC_DIGITS[i];
      }
   }

   return roman.toString();
}